<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <h1>{{msg}}</h1>
    </div>
    <script src="vue.min.js"></script>
    <script>
        new Vue({
            el: '#app',
            data: {
                msg:"hello world"
            },
            created(){// 在页面渲染前执行(插值表达式之前执行)
                debugger
                console.log("在页面渲染前执行---> created");
                
            },
            mounted(){// 在页面渲染后执行
                debugger
                console.log("在页面渲染后执行---> mounted");
            }
        })
    </script>
</body>

</html>